ST. LOUIS (KMOX/AP) – A 22-year-old man is dead following a shooting Tuesday afternoon at Union Station.

Lt. John Green, commander of the city police homicide division, says the shooting does not appear to have been random.

“They were on the MetroLink, and apparently there was an argument with a group of people, and it ended at 18th and Clark,” Green told KMOX. “They got off the train, and that’s when the shooting occurred. It was not a random incident … it appears that the initial argument started on board the train, so they knew each other.”

Green said they’re working with Metro Transit to see if surveillance video can help police track down a suspect or suspects.

The victim’s brother flagged down a passing car to take him to the hospital, but the victim died en route.

Previous reporting:

A man is dead after being shot near Union Station in downtown St. Louis.

Police say the shooting happened Tuesday afternoon. The name of the 22-year-old victim has not been released. Police have released few other details.

Officers responded to a call of a shooting around 1:30 p.m. Police say the man was shot while walking or standing near the intersection of 18th Street and Clark Avenue, near a MetroLink light rail station and a parking lot for Union Station.

The former train station houses a hotel and is currently under renovation, with plans calling for a large aquarium.